Abstract

The equations of the optical/digital fringe multiplication method are derived for a general periodic distribution of intensity versus phase (or fringe order). The method is demonstrated by a shadow moiré experiment, which ideally produces fringe patterns with a triangular intensity distribution. Advantages and disadvantages of the optical/digital fringe multiplication method are discussed in comparison with other image-processing methods.

© 1993 Optical Society of America

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Equations (8)

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